Hi
First of, stop using portato.
Second, you are installing the wrong version of compiz-fusion. You should be installing version
9999 and you are installing version
0.5.2. This is wrong.
Third, you shouldn't be enabling all of those USE flags. If you are using KDE only then you shouldn't be enabling the GNOME use flags.
Can you type
emerge -pv compiz into a konsole and report back as to what it says.
Thanks
Dave